Answer / karna

Actually in Breakers Closing coil and Trip coil are
operated on Pulse command (i.e just initaion is enough,
continous supply not required). Anitpuming Means once the
breaker is colsed ,again if anyone ( Auto Command, Through
TNC switch ) can close it will not close because in closing
circuit Antipuming NC will be in series, Once the breaker
close means antipuming will activate unitll trip command
given by us.

Tripping coil plays major role in Circuit brakers, because
if any faults ( i.e O/L, E/L, short Circuit etc..)occur
breakers has to tirp. For trip we can do manaully at any
time.

Answer / k.prakashchandra

Closing is on command and tripping is either on command or
auto .You are testing the circuit by closing the CB using
the control switch

Why negative feedback is preferred in the control system?

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